CVE-2026-17548: Missing authorization for viewing background jobs

Severity: medium (CVSS 5.3 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-25 · updated 2026-08-26
Weakness: CWE-862

Description

Missing authorization in Checkmk <2.5.0p12, <2.4.0p36, <2.3.0p50 and all 2.2.0 versions allows an authenticated user who knows the ID of a background job to view that job's status and results.

Affected products

Checkmk GmbH Checkmk: from 2.5.0 before 2.5.0p12; from 2.4.0 before 2.4.0p36; from 2.3.0 before 2.3.0p50; 2.2.0 — fixed in 2.3.0p50, 2.4.0p36, 2.5.0p12

How to fix

Upgrade to a fixed version: Checkmk GmbH Checkmk 2.3.0p50, 2.4.0p36, 2.5.0p12. Check the vendor advisory for mitigations.

References

https://checkmk.com/werk/22115

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